Top Alternatives to Nitro

Remember the Milk (RTM) is an application service provider for a Web-based task- and time-management.

Simplenote is an easy way to keep notes, lists, ideas and more.

Google Tasks is the task list functionality provided by Google.

Toodledo is a popular and powerful online productivity tool. Manage your to-do list, take notes, track habits, and organize ideas into outlines and lists.

Things is a delightful and easy to use task manager.

ToDoList is a jack-of-all-trades organizer software that goes far beyond managing shopping lists. The tool allows to create short and precise task list.

A simple and friendly task manager written in Python.

Yodiz is a simple but comprehensive agile tool with visual boards for Sprints, Releases, Backlog, Epics and Issue management.

Doit.im is a Cross-platform Best Online GTD Service, which can sync with Phones.

MyLifeOrganized (MLO) is the most flexible and powerful task management software for getting your to-dos finally done.

Notational Velocity is a software for Mac OS X used for notetaking. It allows users to create notes using solely a computer keyboard and search them using incremental find.

Any.do is a life management and productivity app.

Nirvana is a cloud-based task manager that isn’t just about doing more.

Ora is a real-time all-in-one workspace for teams.

EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries, etc.

2Do lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface.

Markor is a free and opensource text editor for Android.

Tasque is an open source task management application.

Awesome notes is a powerful text and voice note taking application with many great features.

Quiver 3D Augmented Reality coloring apps: print, color and see your drawing in beautifully hand-animated 3D worlds.

Conqu is a simple yet powerful task management tool designed to help you conquer your inbox and get things done.

Go For It is a simple and stylish productivity app, featuring a to-do list, merged with a timer that keeps your focus on the current task.

Clear is a tasks, reminders and To-Do lists app.

Holiline Reminder is a free software calendar program for Windows.

Tasks is a task management app.

GTasks is a simple and efficient todo or task management app with Google synchronization.

FCorp My Calendar is a free software to manage a diary, notes, schedules, birthdays, etc.